When using the alternate AC4400CW with different livery, the instrument light switch does not work. The switch animates but does not light anything up.
So that's what it is! Thank you. I thought I was going nuts thinking "I swear that worked before, why not now?"
I was thinking the exact same thing. I'm not sure what made me check. But at least we now know its the loco, and we are not going nuts lol.